


Apologies if this is a duplicate, I am just curious. Are they both valid? Which originated first?
Either one is fine. Close to the vest has a more British feel to me, but I've heard both in the U.S.
EDIT
OK, since this apparently bothers someone, I did some research and it appears that the "vest" usage is more American. Note that my original statement of "British feel" was admittedly idiosyncratic.
Note also that either one is still fine, despite any individual's peevish disapproval.
Here are some NGram searches and their results:
Apparently the "vest" version came into British English in the late 1950s, but didn't gain widespread acceptance until the 1990s. Currently it looks poised to gain equivalence with the "chest" version, although such things are hard to predict.
Disclaimer I am not a fan of Google NGrams, because they can be used without regard for proper
Tracing the origins of now-familiar (or forgotten) tid-bits of pop-culture.
Because of the meaning of the phrase, I would have expected the idiom to have grown, organically, among the riverboat gamblers of the mid-nineteenth century, or among Old West saloon dudes, gambling in places like Miss Kittys Longbranch Saloon, in the late-nineteenth century. Surprisingly, however, the phrase did not emerge naturally from poker players, generally; it appears to have been coined by a Pulitzer Prize-winning journalist while writing a biography of a potential candidate for President.
Ralph D. Paine, The Call of the Offshore Wind, (1918), chapter 4, Capn Joe Dabney Plays a Hunch, reprinted in The Seattle Star, February 19, 1920.
The idiom was used in the context of super-power politics in 1921:
"Close to the vest" was unheard of, even in the literal sense, before the idiom was coined in 1905. "Close to the chest" was nearly unheard of before "close to the vest was coined," having appeared only once before 1905. But after William Allen White coined the idiom, to play one's cards close to the vest (buttons), in 1905, both the literal use of "close to the vest/chest" and the idiomatic of "close to the vest/chest" occur with increasing frequency.
As for me, Ill keep my cards close to my vest, . . . or was that chest?
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